#include <benchmark/benchmark.h>
#include <string>

#include "text/mesh.hpp"

namespace
Nimbin
{
static const std::string FONT = "/usr/share/fonts/dejavu/DejaVuSansMono.ttf";

// Single short word — fastest case
static void BM_BuildTextMesh_Short(benchmark::State& state)
{
    TextMesh out;
    for (auto _ : state) {
        out.verts.clear();
        out.tris.clear();
        out.vertex_normals.clear();
        benchmark::DoNotOptimize(
            out.build(FONT, "if", 64, 0.14f, 0.003f)
        );
    }
}
BENCHMARK(BM_BuildTextMesh_Short);

// Medium word
static void BM_BuildTextMesh_Medium(benchmark::State& state)
{
    TextMesh out;
    for (auto _ : state) {
        out.verts.clear();
        out.tris.clear();
        out.vertex_normals.clear();
        benchmark::DoNotOptimize(
            out.build(FONT, "function", 64, 0.14f, 0.003f)
        );
    }
}
BENCHMARK(BM_BuildTextMesh_Medium);

// Parameterized over word length
static void BM_BuildTextMesh_Length(benchmark::State& state)
{
    std::string text(static_cast<size_t>(state.range(0)), 'a');
    TextMesh out;
    for (auto _ : state) {
        out.verts.clear();
        out.tris.clear();
        out.vertex_normals.clear();
        benchmark::DoNotOptimize(
            out.build(FONT, text, 64, 0.14f, 0.003f)
        );
    }
    state.SetLabel("len=" + std::to_string(state.range(0)));
}
BENCHMARK(BM_BuildTextMesh_Length)->Arg(1)->Arg(4)->Arg(8)->Arg(16)->Arg(32);

// Different depths shouldn't change cost much (same earcut work,
// just different extrusion). Verify.
static void BM_BuildTextMesh_Depth(benchmark::State& state)
{
    float depth = static_cast<float>(state.range(0)) / 1000.0f;
    TextMesh out;
    for (auto _ : state) {
        out.verts.clear();
        out.tris.clear();
        out.vertex_normals.clear();
        benchmark::DoNotOptimize(
            out.build(FONT, "hello", 64, depth, 0.003f)
        );
    }
    state.SetLabel("depth=" + std::to_string(depth));
}
BENCHMARK(BM_BuildTextMesh_Depth)->Arg(20)->Arg(60)->Arg(140);

} // namespace Nimbin